Skateboard accessory



FIG. 1 is a perspective view of a skateboard accessory showing the new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof, the back view being a mirror image thereof;

FIG. 4 is a right side view thereof, the left side view being a mirror image thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view thereof. 

The ornamental design for a skateboard accessory, as shown and described. 